CN1169658C - Steam technology for drying wood - Google Patents
Steam technology for drying wood Download PDFInfo
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- CN1169658C CN1169658C CNB011115904A CN01111590A CN1169658C CN 1169658 C CN1169658 C CN 1169658C CN B011115904 A CNB011115904 A CN B011115904A CN 01111590 A CN01111590 A CN 01111590A CN 1169658 C CN1169658 C CN 1169658C
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Abstract
The present invention relates to new technology of wood steam integration dryness. After woods enter a kiln, the whole processes of preheating treatment, normal pressure superheated steam dryness, wood conventional dryness, annealing kiln and kiln discharge are carried out; in the process (2) of preheating treatment, the dry indoor temperature is ascended at the speed of 15DEG C per hour; the relatively stable humidity is kept during converting normal pressure superheated steam dryness to the wood conventional drying process. The technology have the advantages of the wood normal pressure superheated steam dryness and the conventional drying technology, and also has the advantages of high speed, good quality and size stability and energy saving. The present invention can be realized in a general steam heating forced circulation drying kiln of good air tightness, and has strong practicability.
Description
The present invention relates to a kind of Wood drying technique.
Existing Wood drying technique mainly contains two kinds, the conventional Wood drying technique of the first, and it two is a super-heated steam drying technology, is thermal source with steam.Timber conventional drying technological requirement baking temperature is less than 100 ℃, and drying medium is a humid air, and its arid cycle is long, and the timber of the particularly difficult deciduous species of doing is generally wanted more than 20 round the clock.And the temperature of super-heated steam drying technological requirement dry bulb thermometer is between 100-135 ℃, the temperature of wet bulb thermometer is between 98～100 ℃, promptly under normal pressure, saturated vapor continuation heating is made it to form normal pressure overheat steam in hothouse and come desiccated wood, this kind drying means cycle is short, and is also not good enough to the broadleaf dry mass that difficulty is done.
The objective of the invention is to explore a kind of new Wood drying technique of invention, make it to keep the characteristics that the super-heated steam drying process cycle is short, Wood Dimensional Stability is good, and make it to keep after the timber conventional drying technology drying lumber quality characteristics preferably again.
Purpose of the present invention realizes with following technology:
1, seasoning stack wood and sending in the hothouse is routinely closed the gate of hothouse and inlet valve, exhaust valve;
2, open axial flow blower, make the indoor air flow circulation, the steam valve of heater, indoor temperature is risen with 15 ℃ the speed of per hour raising, make the temperature of dry bulb thermometer be raised to 100 ℃, open the steam valve of spraying steam pipe simultaneously, make the temperature of wet bulb thermometer also rise to 100 ℃, and kept 2 hours, carry out The pre-heat treatment;
3, close the spraying steam valve, open the steam discharge door, continue the steam valve of heater, make indoor saturated vapor continue heating and in hothouse, form normal pressure overheat steam, the temperature of dry bulb thermometer rises to 106 ℃, and the temperature maintenance of wet bulb thermometer is at 99～100 ℃; And keep this state, drop to about 30% up to moisture content;
4, when moisture content drops to 30% left and right sides, carry out 1 hour intermediate treatment, promptly the temporary close exhaust valve is 1 hour; Close the steam valve of heater, temperature is dropped to gradually: the temperature of dry bulb thermometer is reduced to 56～62 ℃, and the temperature of wet bulb thermometer drops to 49～55 ℃, in this course the humidity that will keep relative stability;
5, the temperature when dry bulb thermometer is 56～62 ℃, when the temperature of wet bulb thermometer is 49～55 ℃, keeps this state to drop to about 20% up to moisture content;
6, when moisture content drops to 20% left and right sides, carry out intermediate treatment one time, when making the temperature of dry bulb thermometer drop to 54～60 ℃, the temperature of wet bulb thermometer is 48～54 ℃, keeps this state to drop to about 10% up to moisture content;
7, when moisture content drops to 10% left and right sides, carry out intermediate treatment again one time, stewing then kiln got final product about 8 hours.
Adopt above-mentioned drying process, both kept the characteristics that the cycle is short, Wood Dimensional Stability is good of the super-heated steam drying technology drying of wood, and make it to keep after the timber conventional drying technology drying lumber quality characteristics preferably again; When having overcome the dry hard broad leaf tree timber of super-heated steam drying technology, ropy deficiency, also overcome long shortcoming of timber conventional drying technology desiccated wood cycle simultaneously.This technology can realize in the dry kiln of the good general Steam Heating forced circulation of air-tightness, does not need special equipment, therefore has strong practicality and feasibility.
Claims (1)
1, a kind of steam technology for drying wood is characterized in that:
(1), closes the gate of hothouse and inlet valve, exhaust valve by timber conventional drying method stack wood and send in the hothouse;
(2) open axial flow blower, make the indoor air flow circulation, the steam valve of heater, indoor temperature is risen with the speed that per hour rises 15 ℃, make the temperature rise to 100 ℃ of dry bulb temperature table, open the steam valve of spraying steam pipe simultaneously, make the temperature of wet bulb thermometer also rise to 100 ℃, and kept 2 hours, carry out The pre-heat treatment.
(3) close spray steam valve door, open the steam discharge door, continue the steam valve of heater, make indoor saturated vapor continue heating and in hothouse, form normal pressure overheat steam, the temperature of dry bulb thermometer rises to 106 ℃, and the temperature maintenance of wet bulb thermometer is at 99～100 ℃; And keep this state, drop to about 30% up to moisture content;
(4) when moisture content drops to 30% left and right sides, carry out 1 hour intermediate treatment, promptly the temporary close exhaust valve is 1 hour; Close the steam valve of heater, temperature is dropped to gradually: the temperature of dry bulb thermometer is reduced to 56～62 ℃, and the temperature of wet bulb thermometer drops to 49～55 ℃, in this course the humidity that will keep relative stability;
(5) temperature when dry bulb thermometer is 56～62 ℃, when the temperature of wet bulb thermometer is 49～55 ℃, keeps this state to drop to about 20% up to moisture content;
(6) when moisture content drops to 20% left and right sides, carry out intermediate treatment one time, make the temperature of dry bulb thermometer drop to 54～60 ℃, the temperature of wet-bulb temperature is 48～54 ℃, keeps this state to drop to about 10% up to moisture content;
(7) when moisture content drops to 10% left and right sides, carry out intermediate treatment again one time, stewing then kiln got final product about 8 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011115904A CN1169658C (en) | 2001-03-20 | 2001-03-20 | Steam technology for drying wood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011115904A CN1169658C (en) | 2001-03-20 | 2001-03-20 | Steam technology for drying wood |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1313178A CN1313178A (en) | 2001-09-19 |
| CN1169658C true CN1169658C (en) | 2004-10-06 |
Family
ID=4659136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011115904A Expired - Fee Related CN1169658C (en) | 2001-03-20 | 2001-03-20 | Steam technology for drying wood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1169658C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101069972B (en) * | 2007-05-28 | 2010-05-26 | 浙江林学院 | Method for producing charred wood by heat treatment |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1815115B (en) * | 2006-03-13 | 2010-05-12 | 张云辉 | Wood rapid-drying method |
| CN1995881B (en) * | 2006-12-27 | 2010-06-23 | 浙江永吉木业有限公司 | Wood floor drying method |
| CN101224593B (en) * | 2008-02-01 | 2010-06-09 | 中国林业科学研究院木材工业研究所 | Wood heat treatment method |
| CN101852539B (en) * | 2010-02-05 | 2013-10-23 | 福建农林大学 | Preparation process for alternatively drying wood by high temperature and room temperature combination |
| CN102303340B (en) * | 2011-06-27 | 2016-03-30 | 潘平 | A kind of stable type double-layer ground-heating solid wood floorboard and manufacture method thereof |
| CN102431067B (en) * | 2011-10-14 | 2014-08-27 | 广东联邦家私集团有限公司 | Pretreatment technology of atmospheric superheated steam for improving wood dimension stability |
| CN103791701B (en) * | 2012-10-31 | 2016-08-03 | 杜慕楠 | A kind of free stuff quick drying kiln and drying means thereof |
| CN103072165B (en) * | 2013-01-05 | 2015-03-11 | 中国热带农业科学院橡胶研究所 | Production method of high-temperature heating modified rubber wood floor |
| CN104895356B (en) * | 2015-06-08 | 2017-09-08 | 北京陆桥商检新技术公司 | A kind of closed ceiling of wood fumigation |
| CN104895351B (en) * | 2015-06-08 | 2017-04-26 | 北京陆桥商检新技术公司 | Wood fumigation closed chamber |
| CN105773766B (en) * | 2016-04-05 | 2017-09-26 | 中南林业科技大学 | A kind of drying of wood and heat modification combination treatment method and device |
-
2001
- 2001-03-20 CN CNB011115904A patent/CN1169658C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101069972B (en) * | 2007-05-28 | 2010-05-26 | 浙江林学院 | Method for producing charred wood by heat treatment |
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| Publication number | Publication date |
|---|---|
| CN1313178A (en) | 2001-09-19 |
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